L.W. Jones is an active participant in the L3
Experiment at the LEP (e+e-) collider together with Michigan faculty colleagues
Professors Byron
Roe and J.
Keith Riles. This experiment is located at the CERN
Laboratory for Particle Physics in Geneva, Switzerland. This L3 collaboration,
of over 500 physicists from over 30 universities and research institutions world-wide, has
been collecting data since 1989 on the characteristics of the Z and W Intermediate Vector
Bosons; their production and decay, and on related issues such as B-quark physics.
With the LEP energy of about 200 GeV (c.m.), increasing emphasis is being placed on
searches for the Higgs Boson and Supersymmetric Particles. This collaboration
is headed by Professor S.C.C. Ting of M.I.T., a former
graduate student of Jones and Professor Martin Perl at Michigan.

A recent focus of Jones' L3 work in the L3 Cosmic program
has been the adaptation of the L3 muon spectrometer for the study of cosmic ray
muons. Besides research on traditional cosmic ray questions such as the composition
of primary cosmic rays, the search for high-energy point sources, etc., these precise muon
data are valuable for the improved calculation of atmospheric muon neutrino fluxes.

Besides participating in the ongoing analysis of the L3 cosmic ray muon data, Jones is
also a collaborator on a new CERN cosmic ray proposal, CORAL; the objective of which will
be the study of muons with a large-area underground tracking chamber array in coincidence
with a surface air shower array in order to better understand the primary cosmic ray
composition. Karsten Eggert is the spokesman for this project.

Jones is an active communicator between the cosmic ray physicists and high-energy
particle physics experimentalists. In recent years he has been an invited speaker at
seminars, colloquia, workshops, conferences and international symposia on 6 continents
where he has presented cosmic ray data and interpretations to accelerator physicists and
the results of high energy accelerator experiments to cosmic ray physicists.

In December, 1998, Jones was honored by the convening of a special symposium at CERN
which was organized and convened by Professor Samuel C.C. Ting in recognition of Jones'
retirement from the Michigan teaching faculty. Speakers included T. Azemoon and B.P.
Roe from Michigan, K. Johnsen and P. LeCoultre from CERN, T.K. Gaisser from Bartol, and
A.M. Sessler from Berkeley.

EARLIER RESEARCH ACTIVITIES:

MiniMax,
a small experiment at the Fermilab Tevatron
proton-antiproton collider, was completed in 1996. This was a search for evidence of
DCC, or "Disoriented Chiral Condensates", a mechanism proposed to explain the
Centauro phenomenon reported from cosmic ray experiments. The experimental
collaboration of about 20 physicists was headed by Professor J.D. Bjorken of SLAC
and Cyrus C. Taylor of Case
Western Research University; Michigan physicists in the collaboration, besides Jones,
were Professor
Michael Longo and Dr. H. Richard Gustafson. Final analysis of the data shows no
evidence of DCC, although the experiment successfully explored inclusive particle
production in the forward pseudorapidity cone (within 50 milliradians of the beam).

Jones has also been a collaborator in the design of FELIX, a proposed detector and experiment
concept which was proposed for a 5th detector at the CERN
Large Hadron Collider (LHC). The objective of FELIX is to explore in detail extreme
forward and backward angles, out to pseudorapidities of 10, following a concept developed
by J.D. Bjorken for the U.S. S.S.C. The co-spokesmen for FELIX are Dr. Karsten
Eggert of CERN and Professor Cyrus Taylor of CWRU. The FELIX proposal has not yet
been approved. Jones also worked with Professor Longo at Michigan on a much smaller
experimental proposal for the Fermilab Tevatron to study inclusive production at very
small forward and backward angles, although this too has not been approved by the
Laboratory.

Earlier Fermilab experiments in which Jones was involved, over the period 1970-90,
included neutron studies (production, elastic and inelastic scattering, cross sections,
etc.), muon pair production, prompt neutrino production, and the direct observation of
proton production of Charm. During the 1960s and early '70s, Jones' experiments at
the CERN Proton Synchrotron, the Brookhaven
Cosmotron and AGS, the Argonne
ZGS, and the Bevatron of the Lawrence
Berkeley Laboratory, were primarily concerned with various strong interactions
processes; elastic scattering, particle production, cross sections, etc. Michigan
collaborators in these experiments included Professors Perl, Longo, and Roe, and Dr.
Gustafson.

During the period 1965-72 Jones directed a cosmic ray experimental program on Mt. Evans
(14,200 ft.) and Echo Lake (10,800 ft.) in Colorado searching for free quarks and studying
inclusive strong interactions at energies above 100 GeV with a 600 liter liquid hydrogen
target, wide-gap spark chambers, and a 100 ton hadron calorimeter. This was during a
time before laboratory accelerator energies exceeded 30 GeV.

Jones, together with Martin Perl, developed the "Luminescent Chamber" (for
photographing tracks in scintillator) in the years 1957-60. Together with other
colleagues and students, he also developed the hadron calorimeter, the wide-gap spark
chamber, and other detector technologies. During the period 1953-62, Jones was a
member of the Midwestern Universities Research Association (MURA) group in accelerator
design, where the Fixed-Field Alternating Gradient (FFAG) accelerator and the colliding
beams concepts were first proposed and developed. With Kent M. Terwilliger he built
and operated, in 1954-57, a 500 keV FFAG electron betatron/synchrotron for the study of
accelerator physics. During the 1980s Jones lead the State of Michigan program to
develop a site proposal for the Superconducting Super Collider. In 1987 he was a
member of the SSC Central Design Group.

Jones has also worked in the development of instrumentation for Nuclear Medicine.
In 1970 he developed concepts related to the use of liquid hydrogen as a chemical
fuel for vehicles and joined an international community with similar interests. In
the late 1990s he worked with members of the Center for Ultra-fast Optical Science at
Michigan in the development of table-top electron accelerators powered by high-power
pulsed lasers.

ADMINISTRATION:

Chair, University of Michigan Department of Physics

1982-1987

TEACHING:

Recent courses taught:

Concepts in 20th Century Physics, College Honors 252

The Physics of Music, Physics 288/489

Energy, Entropy and the Environment, Physics 250

Other courses taught include intermediate courses on Elementary Particle Physics;
Introduction to Quantum Mechanics; Beams, Accelerators, and Detectors for Nuclear and
Particle Physics; Heat and Thermodynamics; Optics; and Mechanics, as well as the full
sequence of Elementary Physics courses.

DEGREES:

Ph.D., Physics, University of California, Berkeley

1952

M.S., Physics, Northwestern University

1949

B.S., Physics, Northwestern University

1948

POSITIONS:

Professor Emeritus

1998-present

Member of the faculty of the University of Michigan Department of Physics